SEARCH Articles Figures Tables Aromatic nitrogen heterocycles Aromatic regioselectivity Aromaticity aromatic heterocycles Aromaticity heterocyclics Aromaticity nitrogen heterocycles Heterocycles aromatic Heterocycles aromatization Heterocyclic aromatic nitrogen Heterocyclic aromatics Heterocyclic nitrogen Heterocyclics six-membered Nitrogen Substitution Nitrogen aromatic Nitrogen, substitutional Regioselective substitution Regioselectivity substitution Six-Membered Heterocycled Six-membered heterocycles Substituted Heterocycles